All About That Big Chip Security Weakness: QuickTake Q&A

Intel Corp. said on Jan. 3 that most of the processors running the world’s computers and smartphones have a feature that makes them susceptible to hacker attacks. The chipmaker, working with partners and rivals, says it has already issued updates to protect most processor products introduced in the past five years, but the news sparked concern about this fundamental building block of the internet, PCs and corporate networks.
The revelation of the so-called Meltdown and Spectre vulnerabilities spurred a scramble among technology’s biggest players, from Apple Inc. to Amazon.com Inc., to enact fixes and reassure customers they were on top of the problem.

Modern processors guess what they’ll have to do next and fetch the data they think they’ll need. That makes everything from supercomputers to smartphones operate very fast. Unfortunately, as Google researchers discovered, it also provides a way for bad actors to read data stored in memory that had been thought to be secure. In a worst-case scenario, that would let someone access your passwords.